leo4687

22.04.2020 • 

Physics

Throughout centuries, mankind used different methods to measure time. List
the methods below historically from oldest to newest.
To measure time
1. People used back and forth motion (ossilation) of pendulums.
2. People used water dripping at a constant rate.
3. People used ossilation of quartz crytals placed in an electric circuit.
4. People used the shadow of a stick as sun travels across the sky.
5. People used atomic clocks using Cesium atoms.

Ответ:

snoopy112007

22.04.2023

Physics

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There are two correct answers for this question. These are the first option and the third option. When energy is being released from the system to the surroundings, this reaction is called an endothermic reaction. The two options fit the description.

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